Senseless for the state field to be protected when the enum used for its type...

Senseless for the state field to be protected when the enum used for its type is private: no subtype could use it anyway.

core/src/main/java/hudson/model/Run.java

@@ -211,7 +211,7 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
     /**
      * The current build state.
      */
-    protected volatile transient State state;
+    private volatile transient State state;
 
     private static enum State {
         /**